Minimizing mutual coupling

ABSTRACT

Disclosed herein are techniques, systems, and methods relating to minimizing mutual coupling between a first antenna and a second antenna.

BACKGROUND

The mobile communication industry is facing the demand of high data rate(and applications, e.g. video applications) on mobile phones to competewith the data rate on wired systems. To meet the increasing demand,standards such as High Speed Downlink Packet Access (HSDPA) and HighSpeed Uplink Packet Access (HSUPA) are being developed within theUniversal Mobile Telecommunications System (UMTS) standard. However,higher date rates may necessitate better signal quality at both a mobileterminal (the mobile phone) and a base station.

For a mobile terminal at an edge of a mobile communications cell, thesignal quality may be limited by thermal noise, noise figure of themobile terminal, noise figure of the base station, as well as a channelquality (fading), limiting a reliable data transfer. Further, feasiblehigh data rates may be obtained only closer to the base station.

To that end, a method to facilitate high data rates is to expand anactive area for the mobile terminal. More specifically, a quantity ofbase stations is increased to minimize the distance between the mobileterminal and the base station. Another method to facilitate high datarates is to increase the signal quality at the mobile terminal. Morespecifically, a second receiver chain (diversity receiver) is employedat the mobile terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

The detailed description is described with reference to the accompanyingfigures. In the figures, the left-most digit(s) of a reference numberidentifies the figure in which the reference number first appears. Theuse of the same reference numbers in different figures indicates similaror identical items.

FIG. 1 is a block diagram of a tunable mutual antenna decoupling system,in a first embodiment.

FIG. 2 is a block diagram of tunable mutual antenna decoupling system,in a second embodiment.

FIGS. 3 a-3 b is a block diagram of tunable mutual antenna decouplingsystem, in a third and a fourth embodiment.

FIG. 4 is a block diagram of tunable mutual antenna decoupling system,in a fourth embodiment.

FIG. 5 is a flowchart of employing the system of FIG. 1, in a firstimplementation.

FIG. 6 is a flowchart employing system of FIG. 1, in a furtherimplementation.

DETAILED DESCRIPTION

The present application describes a tunable mutual antenna decouplingsystem. Many specific details are set forth in the following descriptionand in FIGS. 1-5 to provide a thorough understanding of variousimplementations. One skilled in the art will understand, however, thatthe subject matter described herein may have additional implementations,or that the concepts set forth may be practiced without several of thedetails described in the following description. More specifically, amobile terminal may comprise at least two antennas coupled together viaa tuning circuit, with the tuning circuit altering a phase and anamplitude of a signal between the two antennas by control of a controlunit.

System 100

FIG. 1 shows an overview of a tunable mutual antenna decoupling system100 that may be employed within a mobile terminal. System 100 comprisesa receiving portion 102, a transceiving portion 104, a control portion106, and a baseband module 108.

Receiving Potion 102

Receiving portion 102 of system 100 receives a signal, i.e. a radiosignal via a mobile communications network. Receiving portion 102comprises an antenna 110, a detector module 112, a receiver (RX) frontend filter 114, and a receiver low noise amplifier (LNA) 116.

Antenna 110 may be a planar inverted-F antenna (PIFA), however, antenna110 may be any antenna desired. Antenna 110 may receive a signalS_(radio) from any mobile communications network, including but notlimited to 1G, 2G, 3G, 4G, LTE, WiMax, or any future mobilecommunications network. Antenna 110 is connected to an input terminal118 a of detector module 112.

Detector module 112 receives signal S_(radio) and converts S_(radio)from a RF signal to a DC voltage signal. Detector module 112 comprises a4 port coupler 120, a diode 122, and a resistor 124. Diode 122 isconnected to terminal 118 b of coupler 120 and resistor 124 is connectedto terminal 118 c of coupler 120. A reflected signal S₁ may be input tocontrol portion 106 via path 126. Diode 122 measures a reflected voltagefrom antenna 110 to RX front end filter 114 and produces signal S₂. Anoutput terminal 118 d of detector module 112 is connected to an inputterminal 128 of RX front end filter 114.

RX front end filter 114 is configured to receive signal S₂ from detectormodule 112. Signal S₂ may comprises a receive portion and a transmitportion. To that end, RX front end filter 114 isolates signal S₂ suchthat signal S₂ comprises the receive portion. Further, RX front endfilter 114 may minimize, if not prevent, interference between thereceive portion and the transmit portion of signal S₂. RX front endfilter 114 filters signal S₂ such that signal S₂ may comprise a desiredfrequency band, defining signal S₃. The desired frequency band of signalS₃ comprises substantially only reception signals to be received fromthe mobile communications network. An output terminal 130 of RX frontend filter 114 is connected to an input terminal 132 of receiver LNA116.

Receiver LNA 116 is configured to receive signal S₃ from RX front endfilter 114. Receiver LNA 116 amplifies signal S₃, creating andoutputting signal S₄. An output terminal 134 of receiver LNA 116 isconnected to an input terminal 136 of baseband module 108 and an inputterminal 137 of control portion 106, described further below.

Transceiving Portion 104

Transceiving portion 104 of system 100 also receives the aforementionedradio signal via the mobile communications network, and furthertransmits an additional signal via the mobile communications network.Transceiving portion 104 comprises an antenna 138, duplex filters 140and 142, a transmitter power amplifier (PA) 144, and a receiver LNA 146.

Analogous to antenna 110 of receiving portion 102, antenna 138 may be aplanar inverted-F antenna (PIFA), however, antenna 138 may be anyantenna desired. Antenna 138 may receive the signal S_(radio) from anymobile communications network. In a further implementation, antenna 138may receive a differing signal from the mobile communications network.Antenna 138 may also transmit a signal S_(transmit), described furtherbelow. Antenna 138 is connected to input terminal 147 of duplex filter142.

Analogous to RX front end filter 114, duplex filter 140 is configured toreceive signal S_(radio) from antenna 138. Signal S_(radio) may comprisea receive portion and a transmit portion. To that end, duplex filter 140isolates signal S_(radio) such that signal S_(radio) comprises thereceive portion. Further, duplex filter 140 may minimize, if notprevent, interference between the receive portion and the transmitportion of signal S_(radio). Duplex filter 140 filters signal S_(radio)such that signal S_(radio) may comprise a desired frequency band,defining signal S₄. The desired frequency band of signal S₄ comprisessubstantially only reception signals to be received from the mobilecommunications network. An output terminal 148 of duplex filter 140 isconnected to an input terminal 150 of receiver LNA 146.

Receiver LNA 146 is configured to receive signal S₄ from duplex filter140. Receiver LNA 146 amplifies signal S₄, creating and outputtingsignal S₅. An output terminal 152 of receiver LNA 146 is connected to aninput terminal 154 of baseband module 108 and an input terminal 156 ofcontrol portion 106, described further below.

An input terminal 158 of transmitter PA 144 is connected to an outputterminal 160 of baseband module 108. Transmitter PA 144 is configured toreceive a signal S₆ from baseband module 108 and amplify the same,creating and outputting a signal S₇. An output terminal 162 oftransmitter PA 144 is connected to an input terminal 164 of duplexfilter 142.

Duplex filter 142 is configured to receive signal S₇ from transmitter PA144. Signal S₇ may comprise a receive portion and a transmit portion. Tothat end, duplex filter 142 isolates signal S₇ such that signal S₇comprises the receive portion. Further, duplex filter 142 may minimize,if not prevent, interference between the receive portion and thetransmit portion of signal S₇. Duplex filter 142 filters signal S₇ suchthat signal S₇ may comprise a desired frequency band, defining signalS_(transmit). The desired frequency band of signal S_(transmit)comprises substantially only transmission signals to be transmitted tothe mobile communications network. An output terminal 166 of duplexfilter 142 is connected to antenna 138. Antenna 138 may transmit signalS_(transmit) to the mobile communications network.

In a further embodiment, system 100 may comprise more than two antennas.

Mutual Coupling of Antennas 110 and 138

Antennas 110 and 138 may be located physically proximate to one anotherwithin system 100. Upon excitation of either (or both) of antennas 110and 138, energy may be transferred from antenna 110 to antenna 138 (orfrom antenna 138 to antenna 110). As such, antennas 110 and 138 may bemutually coupled. However, a low mutual coupling between antennas 110and 132 may be desired, i.e. antenna isolation may be desired. A lowmutual coupling may lead to at least 1) optimized diversity gain ofantennas 110 and 138; 2) low absorption of transmitted power in antennas110 and 138; and 3) optimal filter requirements of signal S_(transmit).

Further, the mutual coupling between antennas 110 and 138 may further bealtered dynamically as a result of user interference. More specifically,either (or both) of antennas 110 and 138 may be covered (partially orfully) by a user using the mobile terminal, and thus, result in signalloss. Further, a position (free-space, talk, on table, etc.) of system100, and specifically antennas 110 and 138, may alter the mutualcoupling thereof.

To that end, to minimize, if not prevent, the mutual coupling betweenantennas 110 and 138, antennas 110 and 138 may be coupled to one anothervia a tuning strip 168 and a tuning module 170, described further below.

Control Portion 106

Control portion 106 of system 100 controls a mutual coupling betweenantennas 110 and 138. Control portion 106 comprises the tuning module170 and a control module 172.

Tuning module 170 is connected to antenna 110 via tuning strip 168 a andis further connected to antenna 138 via tuning strip 168 b. Morespecifically, an output terminal 174 of tuning module 170 is connectedto antenna 110 via tuning strip 168 a and an output terminal 176 oftuning module 160 is connected to antenna 138 via tuning strip 168 b. Ina further implementation, as shown in FIG. 2, tuning strips 168 may beconnected to metal plates 202 of antennas 110 and 138. In still afurther implementation, as shown in FIG. 3 a, tuning strips 168 may beconnected to feeding ports 302 of antennas 110 and 138. In still afurther implementation, as shown in FIG. 3 b, tuning strips 168 may beconnected to a ground plane 304 of antennas 110 and 138.

To that end, a signal S₉ may be transmitted between antennas 110 and138. At a specific frequency (or frequency band) that antennas 110 and138 receive signal S_(radio), signal S₉ may minimize, if not prevent,the mutual coupling between antennas 110 and 138 and further provide animproved antenna isolation in a frequency range (single band) around thespecific frequency.

Furthermore, to minimize, if not prevent, mutual coupling betweenantennas 110 and 138 for a plurality of frequency bands (multi band)that antennas 110 and 138 may receive signal S_(radio), tuning module160 may dynamically alter a phase and an amplitude of signal S₉,described further below. Also, as mentioned above, user interference mayalter the mutual coupling between antennas 110 and 138. As a result,tuning module 160 also alters the phase and amplitude of signal S₉ inrelation to user interference and positional changes of system 100.

Control module 172 facilitates minimizing, if not preventing, mutualcoupling between antennas 110 and 138 by controlling tuning module 170.An output terminal 178 of control module 172 is connected to an inputterminal 180 of tuning module 170 and is configured to receive a signalS₁₀ from control module 172. Control module 172 determines signal S₁₀based upon multiple parameters from baseband module 108 and a receivedsignal strength indication (RSSI) parameter from receiver LNAs 116 and146, described further below.

Baseband Module 108

Baseband module 108 determines a plurality of parameters that controlmodule 172 employs to determine signal S₁₀ (and ultimately, signal S₉).More specifically, baseband module 108 comprises parameters modules 182,such as a bit error rate (BER) module 182 a, a power control module 182b, a forward power module 182 c, a reflected power module 182 d, a usemodule 182 e, a sensor module 182 f, and a current consumption module182 g.

The details of parameter modules 182 of baseband module 108 are asfollows:

-   -   BER module 182 a determines a lowest possible BER.    -   The power level required to obtain a desired performance in the        uplink by the mobile terminal is sent by the mobile        communications network. As such, power control module 182 b        determines a minimum power control level feedback from the        mobile communications network.    -   The decoupling of antennas 110 and 138 may be optimized for        minimum transmission power at either antenna 110 or 138 (or        both). If power at a detector is coming from the transmission or        other sources, the forward power may be measured with a        directional coupler and a detector at forward power module 182        c.    -   The reflected power module 182 d detects if either antenna 110        or 138 (or both) is detuned. The reflected power module 182 d        may comprise a directional coupler (not shown) and a detector        (not shown).    -   The use module 182 e determines an influence of user interaction        and provides statistical data such as a position of the user's        hands and/or head.    -   The sensor module 182 f provides data via sensors on a casing of        the mobile terminal of user interaction.    -   The current consumption module 182 g minimizes the current        consumption, and in particular, the current consumption of        receiver LNA 116 and 146 and transmitter PA 144. The current        consumption of transmitter PA 144 is dependent upon the load at        transmitter PA 144.

Each of modules 182 a-g comprise an output terminal 184 a-g,respectively. Further, an input terminal 186 a-g of control module 172is connected to an output terminal 184 a-g, respectively, of modules 182a-g. As a result, the control parameters determined by modules 182 a-gare communicated to control module 172. For simplicity of illustration,only output terminal 184 e and input terminal 186 e are labeled.

RSSI Signal

As mentioned above, control module 172 also determines signal S₁₀ basedupon a received signal strength indication (RSSI) parameter fromreceiver LNAs 116 and 146. Also, as mentioned, the output terminal 134of receiver LNA 116 is connected to the input terminal 138 of controlportion 106 (i.e. control module 172) and the output terminal 152 ofreceiver LNA 146 is connected to an input terminal 156 of controlportion 106 (i.e. control module 172).

The RSSI parameter is optimized if a magnitude of S_(radio) is below acertain threshold. This control parameter is communicated to controlmodule 164.

Tuning of Tuning Module 170

As mentioned above, control module 172 determines signal S₁₀ based uponmultiple parameters from parameter modules 182 of baseband module 108and a received signal strength indication (RSSI) parameter fromreceivers 116 and 146. Based upon these parameters, control module 172tunes tuning module 170 via signal S₁₀ such that signal S₉ communicatedto antennas 110 and 138 via tuning module 170 results in minimizing, ifnot preventing, a mutual coupling between antennas 110 and 138. Morespecifically, control module 172 tunes tuning module 170 via signal S₁₀to alter phase and amplitude of signal S₉ such that the phase and theamplitude of signal S₉ communicated to antennas 110 and 138 via tuningmodule 170 results in minimizing, if not preventing, a mutual couplingbetween antennas 110 and 138.

The tuning of tuning module 170 may be done iteratively for eachparameter, wherein each parameter may be weighted according to animportance, depending on the application desired. Further, signal S₁₀may comprise a product of the weighted parameters.

System 400

FIG. 4 shows an additional implementation of a tunable mutual antennasystem 400. System 400 comprises transceiving portions 402 and 404,control portion 406, and baseband module 408.

Transceiving Portion 402

Portions of transceiving portion 402 are analogous to receiving portion102 mentioned above with respect to FIG. 1. More specifically, antenna410, detector module 412, duplex filter 414, and receiver PA 416 areanalogous to antenna 110, detector module 112, RX front end filter 114,and receiver LNA 116, respectively, of FIG. 1. As such, any reference toany portion of the analogous portions of receiving portion 102 may beapplied analogous to the corresponding portion of transceiving portion402. However, detector module 412 differs slightly from detector module112. More specifically, detector module 412 comprises an additionaldiode 416 in place of resistor 124. Further, an additional reflectedsignal S₁, may be input to control portion 106 via path 418.

Further, transceiving portion 402 comprises a tuning module 420, anadditional duplex filter 422, and a transmitter PA 424.

Transmitter PA 424 and Additional Duplex Filter 422

An input terminal 426 of transmitter PA 424 is connected to an outputterminal 428 of baseband module 408. Transmitter PA 424 is configured toreceive a signal S₁₁ from baseband module 408 and amplify the same,creating and outputting a signal S₁₂. An output terminal 430 oftransmitter PA 424 is connected to an input terminal 432 of duplexfilter 422.

Analogous to duplex filters 414, duplex filter 422 is configured toreceive signal S₁₁ from transmitter PA 424. Signal S₁₁ may comprise areceive portion and a transmit portion. To that end, duplex filter 422isolates signal S₁₁ such that signal S₁₁ comprises the transmit portion.Further, duplex filter 422 may minimize, if not prevent, interferencebetween the receive portion and the transmit portion of signal S₁₁.Duplex filter 422 filters signal S₁₁ such that signal S₁₁ may comprise adesired frequency band, defining signal S₁₂. The desired frequency bandof signal S₁₂ comprises substantially only transmission signals to betransmitted to the mobile communications network. An output terminal 434of duplex filter 422 is connected to detector module 412.

Tuning Module 420

Tuning module 420 tunes a frequency band that antenna 410 may receivesignals via the mobile communications network. An input terminal 436 oftuning module 420 is connected to an output terminal 438 of controlportion 406. Tuning module 420 is configured to receive a signal S₁₃from control portion 406, described further below.

In an implementation, tuning module 420 comprises switches combined witha single or multiple capacitors and/or inductors (e.g. a capacitor bank,an inductor bank, and a capacitor & inductor bank). By employing RFswitches, the tuning of tuning module 420 is in discrete steps (e.g. 4elements in the bank allow 4 bit control). The types of switchesinclude, but are not limited to, RF MEMS (ohmic and/or capacitive), pindiodes, transistor, silicon on sapphire, PHEMT, and MESFET. Thecapacitors may be discrete SMD type capacitors and/or a combination ofthin film capacitors. The values of the capacitors may be controlled byan analog voltage, i.e. controlled by a diode, varactor, dielectricbased material, RF MEMS based capacitors.

Transceiving Portion 404

Transceiving portion 404 is analogous to transceiving portion 402. Assuch, any reference to any portion of transceiving portion 402 may beapplied analogous to the corresponding portion of transceiving portion404. In an example, antenna 440, tuning circuit 442, detector module444, duplex filters 446 and 448, receiver PA 450, and transmitter PA 452is analogous to antenna 410, tuning circuit 420, detector module 412,duplex filters 414 and 422, receiver PA 424, and transmitter 416,respectively.

Control Portion 406

Control portion 406 is analogous to control portion 106 of FIG. 1. Morespecifically, control module 454 and tuning module 456 are analogous tocontrol module 172 and tuning module 170 of FIG. 1, respectively.

Further, control module 454 controls a tuning of tuning module modules436 and 442 via signal S₁₃. More specifically, control module 454controls tuning modules 420 and 442 such that tuning modules 420 and 442alter a frequency band which antennas 410 and 440 receive signals fromthe mobile communications network. In an example, control modules 454controls tuning modules 420 and 442 such that tuning modules 420 and 442alter the frequency band of antennas 410 and 440 such that antennas 410and 442 receive a signal at substantially the same frequency.

Baseband Module 408

Baseband Module 408 is analogous to baseband module 108 of FIG. 1. Morespecifically, parameter modules 458 are analogous to parameter modules182 of FIG. 1.

Process Model 500

FIG. 5 shows a method 500 of employing system 100. The process 500 isillustrated as a collection of referenced acts arranged in a logicalflow graph, which represent a sequence that can be implemented inhardware, software, or a combination thereof. The order in which theacts are described is not intended to be construed as a limitation, andany number of the described acts can be combined in other orders and/orin parallel to implement the process.

At step 502, BER module 182 a determines a lowest possible BER.

At step 504, power control module 182 b determines a minimum powercontrol level feedback from the mobile communications network

At step 506, forward power module 182 c measures the forward power.

At step 508, reflected module 182 d detects if either antenna 110 or 138(or both) is detuned.

At step 510, use module 182 e determines an influence of userinteraction and provides statistical data such as a position of theuser's hands and/or head.

At step 512, sensor module 182 f provides data via sensors on a casingof the mobile terminal of user interaction.

At step 514, current consumption module 182 g minimizes the currentconsumption, and in particular, the current consumption of receiver LNA116 and 146 and transmitter PA 144.

At step 516, a received signal strength of S_(radio) is determined.

At step 518, parameter modules 182 communicate the control parameters tocontrol module 172.

At step 520, control module 172 determines signal S₁₀ based upon themultiple parameters from parameter modules 182 of baseband module 108and a received signal strength indication (RSSI) parameter from receiverPAs 116 and 146.

At step 522, control module 172 tunes tuning module 170 via signal S₁₀such that the phase and the amplitude of signal S₉ communicated toantennas 110 and 138 via tuning module 170 result in minimizing, if notpreventing, a mutual coupling between antennas 110 and 138.

At step 524, it is determined if a coupling level between antennas 110and 138 is acceptable and/or desirable. If the coupling level betweenantennas 110 and 138 is acceptable and/or desirable, the process isended at step 526. If the coupling level between antennas 110 and 138 isnot acceptable and/or desirable, process 500 is repeated iterativelyuntil the coupling level between antennas 110 and 138 is acceptableand/or desirable.

Process Model 600

FIG. 6 shows a method 600 of employing system 100. The process 600 isillustrated as a collection of referenced acts arranged in a logicalflow graph, which represent a sequence that can be implemented inhardware, software, or a combination thereof. The order in which theacts are described is not intended to be construed as a limitation, andany number of the described acts can be combined in other orders and/orin parallel to implement the process. Further, FIG. 6 referenceselements of FIG. 1.

At step 602, antenna 110 is coupled to antenna 138.

At step 604, antenna 110 receives signal S_(radio).

At step 606, a phase and an amplitude of signal S₉ (control signal) isaltered.

At step 608, a plurality of parameters from parameter modules 182 isdetermined to affect the phase and the amplitude of signal S₉ such thata mutual coupling between antenna 110 and antenna 138 is minimized.

Conclusion

Although the subject matter has been described in language specific tostructural features and/or methodological acts, it is to be understoodthat the subject matter defined in the appended claims is notnecessarily limited to the specific features or acts described. Rather,the specific features and acts are disclosed as exemplary forms ofimplementing the claims.

1. A system comprising: a receiving portion, comprising a first antenna,to receive a first radio signal; a transceiving portion, comprising asecond antenna, to receive the first radio signal and transmit a secondradio signal, the second radio signal differing from the first radiosignal; a baseband module; a control portion comprising: a tuningmodule; and a control module coupled between the baseband module and thetuning module, the control module configured to determine a tuningsignal between the control module and the tuning module such that thetuning module alters a phase and an amplitude of a control signalbetween the tuning module and the first and the second antenna; whereinthe baseband module determines a plurality of parameters that affect thephase and the amplitude of the control signal such that a mutualcoupling between the first antenna and the second antenna is minimized.2. The system as recited in claim 1, the receiving portion furthercomprising a duplex filter to isolate the first radio signal such thatthe first radio signal comprises a desired frequency band.
 3. The systemas recited in claim 2, wherein the receiving portion further comprises arectifying module coupled between the first antenna and the duplexfilter to convert the first radio signal to a DC voltage signal.
 4. Thesystem as recited in claim 1, the transceiving portion furthercomprising a first duplex filter to isolate the first radio signal suchthat the first radio signal comprises a desired frequency band and asecond duplex filter to isolate the second radio signal such that thesecond radio signal comprises a desired frequency band.
 5. The system asrecited in claim 1, the baseband portion further comprising a pluralityof parameter modules, the parameter modules comprising a bit error rate(BER) module, a power control module, a forward power module, areflected power module, a use module, a sensor module, and a currentconsumption module.
 6. The system as recited in claim 1 wherein thereceiving portion and the transceiving portion comprising a plurality ofantennas.
 7. The system as recited in claim 1 wherein the mutualcoupling is minimized about a plurality of frequency bands of the firstradio signal.
 8. A system comprising: a first transceiving portion,comprising a first antenna, to receive a first radio signal and transmita second radio signal, the second radio signal differing from the firstradio signal; a second transceiving portion, comprising a secondantenna, to receive the first radio signal and transmit the second radiosignal; a control portion coupled to the first and the second antenna,the control portion configured to alter a phase and an amplitude of acontrol signal between the first and the second antenna and the controlportion; and a baseband module, in communication with the controlportion, to determine a plurality of parameters to affect the phase andthe amplitude of the signal such that a mutual coupling between thefirst antenna and the second antenna is minimized.
 9. The system asrecited in claim 8, the first transceiving portion further comprising afirst duplex filter to isolate the first radio signal such that thefirst radio signal comprises a desired frequency band and a secondduplex filter to isolate the second radio signal such that the secondradio signal comprises a desired frequency band.
 10. The system asrecited in claim 9, the second transceiving portion further comprising afirst duplex filter to isolate the first radio signal such that thefirst radio signal comprises a desired frequency band and a secondduplex filter to isolate the second radio signal such that the secondradio signal comprises a desired frequency band.
 11. The system asrecited in claim 10, the control portion further comprising a controlmodule and a tuning module, the control module coupled between thebaseband module and the tuning module, the tuning module coupled betweenthe control module and the first and the second antenna, the tuningmodule receiving an additional signal from the control module andoutputting the signal to the first and the second antenna to minimizethe mutual coupling between the first antenna and the second antenna.12. The system as recited in claim 11, the baseband portion furthercomprising a plurality of parameter modules, the parameter modulescomprising a bit error rate (BER) module, a power control module, aforward power module, a reflected power module, a use module, a sensormodule, and a current consumption module.
 13. The system as recited inclaim 12, wherein the receiving portion further comprises a rectifyingmodule coupled between the first antenna and the duplex filter toconvert the first radio signal to a DC voltage signal.
 14. The system asrecited in claim 13, wherein the receiving portion and the transceivingportion comprising a plurality of antennas.
 15. The system as recited inclaim 14, wherein the mutual coupling is minimized about a plurality offrequency bands of the first radio signal.
 16. The system as recited inclaim 15, wherein the control portion is coupled to the first and thesecond antenna via tuning strips.
 17. A method comprising: coupling afirst antenna with a second antenna; receiving a radio signal by thefirst antenna; altering a phase and an amplitude of a control signalbetween the first and the second antenna and a control portion coupledto the first and the second antenna; and determining a plurality ofparameters to affect the phase and the amplitude of the signal such thata mutual coupling between the first antenna and the second antenna isminimized.
 18. The method as recited in claim 17 further comprisingreceiving the radio signal by the second antenna.
 19. The method asrecited in claim 17 further comprising transmitting an additional radiosignal by the first antenna.
 20. The method as recited in claim 17wherein the mutual coupling is minimized about a plurality of frequencybands of the first radio signal.